i

XY @ (0,0)
A moves W to (0, 4)
B moves E to (0, -4)
C moves S to (-4, 0)
D moves N to (4, 0)

ii

XY @ (0, 0)
A moves SE to (1.75, 1.25), W to (-1.75, 1.25), N to (0, 4)
B moves NW to (-1.75, -1.25), E to (1.75, -1.25), S to (0, -4)
C @ (-4, 0)
D @ (4, 0)